President Barack Obama is announcing new economic sanctions against key sectors of the Russian economy, in the latest move by the U.S. to force Russian President Vladimir Putin to end his support for Ukrainian rebels.
Obama says the sanctions target Russia's energy, weapons and finance industries, including big banks.
The U.S. penalties follow tougher sanctions that European Union leaders agreed to earlier in the day.
The president spoke from the South Lawn of the White House Tuesday afternoon.
From NPR: White House Threatens More Russia Sanctions, As Kerry Decries Rebels In Ukraine